diff options
Diffstat (limited to 'kernel/drivers/leds/leds-fsg.c')
| -rw-r--r-- | kernel/drivers/leds/leds-fsg.c | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/kernel/drivers/leds/leds-fsg.c b/kernel/drivers/leds/leds-fsg.c new file mode 100644 index 000000000..2b4dc738d --- /dev/null +++ b/kernel/drivers/leds/leds-fsg.c @@ -0,0 +1,225 @@ +/* + * LED Driver for the Freecom FSG-3 + * + * Copyright (c) 2008 Rod Whitby <rod@whitby.id.au> + * + * Author: Rod Whitby <rod@whitby.id.au> + * + * Based on leds-spitz.c + * Copyright 2005-2006 Openedhand Ltd. + * Author: Richard Purdie <rpurdie@openedhand.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/kernel.h> +#include <linux/platform_device.h> +#include <linux/leds.h> +#include <linux/module.h> +#include <linux/io.h> +#include <mach/hardware.h> + +#define FSG_LED_WLAN_BIT 0 +#define FSG_LED_WAN_BIT 1 +#define FSG_LED_SATA_BIT 2 +#define FSG_LED_USB_BIT 4 +#define FSG_LED_RING_BIT 5 +#define FSG_LED_SYNC_BIT 7 + +static short __iomem *latch_address; +static unsigned short latch_value; + + +static void fsg_led_wlan_set(struct led_classdev *led_cdev, + enum led_brightness value) +{ + if (value) { + latch_value &= ~(1 << FSG_LED_WLAN_BIT); + *latch_address = latch_value; + } else { + latch_value |= (1 << FSG_LED_WLAN_BIT); + *latch_address = latch_value; + } +} + +static void fsg_led_wan_set(struct led_classdev *led_cdev, + enum led_brightness value) +{ + if (value) { + latch_value &= ~(1 << FSG_LED_WAN_BIT); + *latch_address = latch_value; + } else { + latch_value |= (1 << FSG_LED_WAN_BIT); + *latch_address = latch_value; + } +} + +static void fsg_led_sata_set(struct led_classdev *led_cdev, + enum led_brightness value) +{ + if (value) { + latch_value &= ~(1 << FSG_LED_SATA_BIT); + *latch_address = latch_value; + } else { + latch_value |= (1 << FSG_LED_SATA_BIT); + *latch_address = latch_value; + } +} + +static void fsg_led_usb_set(struct led_classdev *led_cdev, + enum led_brightness value) +{ + if (value) { + latch_value &= ~(1 << FSG_LED_USB_BIT); + *latch_address = latch_value; + } else { + latch_value |= (1 << FSG_LED_USB_BIT); + *latch_address = latch_value; + } +} + +static void fsg_led_sync_set(struct led_classdev *led_cdev, + enum led_brightness value) +{ + if (value) { + latch_value &= ~(1 << FSG_LED_SYNC_BIT); + *latch_address = latch_value; + } else { + latch_value |= (1 << FSG_LED_SYNC_BIT); + *latch_address = latch_value; + } +} + +static void fsg_led_ring_set(struct led_classdev *led_cdev, + enum led_brightness value) +{ + if (value) { + latch_value &= ~(1 << FSG_LED_RING_BIT); + *latch_address = latch_value; + } else { + latch_value |= (1 << FSG_LED_RING_BIT); + *latch_address = latch_value; + } +} + + +static struct led_classdev fsg_wlan_led = { + .name = "fsg:blue:wlan", + .brightness_set = fsg_led_wlan_set, + .flags = LED_CORE_SUSPENDRESUME, +}; + +static struct led_classdev fsg_wan_led = { + .name = "fsg:blue:wan", + .brightness_set = fsg_led_wan_set, + .flags = LED_CORE_SUSPENDRESUME, +}; + +static struct led_classdev fsg_sata_led = { + .name = "fsg:blue:sata", + .brightness_set = fsg_led_sata_set, + .flags = LED_CORE_SUSPENDRESUME, +}; + +static struct led_classdev fsg_usb_led = { + .name = "fsg:blue:usb", + .brightness_set = fsg_led_usb_set, + .flags = LED_CORE_SUSPENDRESUME, +}; + +static struct led_classdev fsg_sync_led = { + .name = "fsg:blue:sync", + .brightness_set = fsg_led_sync_set, + .flags = LED_CORE_SUSPENDRESUME, +}; + +static struct led_classdev fsg_ring_led = { + .name = "fsg:blue:ring", + .brightness_set = fsg_led_ring_set, + .flags = LED_CORE_SUSPENDRESUME, +}; + + +static int fsg_led_probe(struct platform_device *pdev) +{ + int ret; + + /* Map the LED chip select address space */ + latch_address = (unsigned short *) devm_ioremap(&pdev->dev, + IXP4XX_EXP_BUS_BASE(2), 512); + if (!latch_address) + return -ENOMEM; + + latch_value = 0xffff; + *latch_address = latch_value; + + ret = led_classdev_register(&pdev->dev, &fsg_wlan_led); + if (ret < 0) + goto failwlan; + + ret = led_classdev_register(&pdev->dev, &fsg_wan_led); + if (ret < 0) + goto failwan; + + ret = led_classdev_register(&pdev->dev, &fsg_sata_led); + if (ret < 0) + goto failsata; + + ret = led_classdev_register(&pdev->dev, &fsg_usb_led); + if (ret < 0) + goto failusb; + + ret = led_classdev_register(&pdev->dev, &fsg_sync_led); + if (ret < 0) + goto failsync; + + ret = led_classdev_register(&pdev->dev, &fsg_ring_led); + if (ret < 0) + goto failring; + + return ret; + + failring: + led_classdev_unregister(&fsg_sync_led); + failsync: + led_classdev_unregister(&fsg_usb_led); + failusb: + led_classdev_unregister(&fsg_sata_led); + failsata: + led_classdev_unregister(&fsg_wan_led); + failwan: + led_classdev_unregister(&fsg_wlan_led); + failwlan: + + return ret; +} + +static int fsg_led_remove(struct platform_device *pdev) +{ + led_classdev_unregister(&fsg_wlan_led); + led_classdev_unregister(&fsg_wan_led); + led_classdev_unregister(&fsg_sata_led); + led_classdev_unregister(&fsg_usb_led); + led_classdev_unregister(&fsg_sync_led); + led_classdev_unregister(&fsg_ring_led); + + return 0; +} + + +static struct platform_driver fsg_led_driver = { + .probe = fsg_led_probe, + .remove = fsg_led_remove, + .driver = { + .name = "fsg-led", + }, +}; + +module_platform_driver(fsg_led_driver); + +MODULE_AUTHOR("Rod Whitby <rod@whitby.id.au>"); +MODULE_DESCRIPTION("Freecom FSG-3 LED driver"); +MODULE_LICENSE("GPL"); |